Rebirth in a Ruined Nation! The Life of a New Strategist Starting From Now

Synopsis

Forty years ago my country burned, and I was one of the few who crawled out of the fire. I was a clerk. No sword, no magic, nothing but a good memory and a shelf of old war records. Then I woke up two years before the fall, young again, remembering every battle that has not been fought yet. Knowing how it ends turns out to be nothing like being able to stop it.